Home / 2,319.40-3,200.78-1,375.67

Finding the Fourth Proportional to 2,319.40, 3,200.78 and 1,375.67

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Solution

The fourth proportional to 2,319.40, 3,200.78 and 1,375.67 is: 1,898.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,319.40 : 3,200.78 = 1,375.67 : x
  2. Step 2: Convert to fraction form
    2,319.40/3,200.78 = 1,375.67/x
  3. Step 3: Cross multiply
    2,319.40x = 3,200.78 × 1,375.67
  4. Step 4: Simplify right side
    2,319.40x = 4,403,210.46
  5. Step 5: Solve for x
    x = 4,403,210.46/2,319.40
  6. Step 6: Final answer
    x = 1,898.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.